Michigan State Trunkline Highway System

This lists all roads designated as Interstates, U.S. Highways and State Highways in Michigan

Interstates

Interstate 69, from Indiana south of Coldwater to Port Huron.
Temporary Interstate 69 (between Lansing and Flint) (decommissioned), from Charlotte to Morrice
Interstate 73, (proposed, but all future study halted; essentially removed from consideration)
Interstate 75, from Ohio south of Erie to Sault Ste. Marie.
Temporary Interstate 75 (central Michigan), (decommissioned) from Bay City to Grayling
Interstate 94, from Indiana near New Buffalo to Port Huron.
Interstate 96, Norton Shores to Detroit.
Interstate 194, Battle Creek.
Interstate 196, northeast of Benton Harbor to Grand Rapids.
Interstate 296, (unsigned) Grand Rapids.
Interstate 275, Newport to Novi.
Interstate 375, Downtown Detroit.
Interstate 475, Flint.
Interstate 496, Lansing.
Interstate 675, Saginaw.
Interstate 696, Metro Detroit.

U.S. Highways

U.S. Highway 2, from Wisconsin at Ironwood to Saint Ignace.
U.S. Highway 8, from Wisconsin near Norway to Norway.
U.S. Highway 10, from Wisconsin at Ludington to Bay City.
U.S. Highway 12, from Indiana near New Buffalo to Detroit.
U.S. Highway 16 (decommissioned)
U.S. Highway 23, from Ohio near Temperance to Mackinaw City.
U.S. Highway 24, from Ohio near Erie to Clarkston.
U.S. Highway 25 (decommissioned)
U.S. Highway 27 (decommissioned)
U.S. Highway 31, from Indiana near Niles to Mackinaw City.
U.S. Highway 33 (decommissioned)
U.S. Highway 41, from Wisconsin at Menominee to east of Copper Harbor.
U.S. Highway 45, from Wisconsin south of Watersmeet to Ontonagon.
U.S. Highway 102 (decommissioned)
U.S. Highway 112 (decommissioned)
U.S. Highway 127, from Ohio south of Hudson to I-75 south of Grayling.
U.S. Highway 131, from Indiana near White Pigeon to Petoskey.
U.S. Highway 141, from Wisconsin at Quinnesec to US-41 near Covington.
U.S. Highway 223, from Ohio near Temperance to US-12 near Somerset.

State Highways

Note that in Michigan, all state highways (not Interstates and U.S. highways) are identified as "M-nn" as opposed to "Route nn" or "Highway nn." This usage dates from 1918, when Michigan's state trunklines were first signed in the field. The state highway route marker is a diamond with a block letter "M" at the top.

Although "M-nn" outside of Michigan could refer to other state, provincial, local, or national highways, local usage in those areas does not mimic the Michigan usage in most cases. In the United Kingdom, "M" refers to motorways, analogous to freeways in the United States. The "M" in the "M-nn" route designation never refers to "superhighway" or "freeway" status in Michigan, however. "M-routes" (Michigan state trunklines) are designated along eight-lane freeways in urban aras, principal arterial highways, and lonely two-lane highways in far-flung rural areas.

No discernible pattern is to be inferred in Michigan's numbering system.

Michigan State Highway 1, Woodward Avenue, from downtown Detroit to Oakland County.
Michigan State Highway 3, Randolph St in downtown Detroit, Gratiot Avenue northeast to New Baltimore.
Michigan State Highway 4, (decommissioned) A portion of present-day M-10.
Michigan State Highway 5, Grand River Avenue (in part), goes from downtown Detroit to Commerce Twp.
Michigan State Highway 6, South Beltline Freeway, from I-196 near Hudsonville to I-96 near Cascade.
Michigan State Highway 8, I-96 in Detroit to east of I-75 at Hamtramck.
Michigan State Highway 10, John C. Lodge Freeway & Northwestern Highway, goes from downtown Detroit to Farmington Hills, connects with Interstate 75, Interstate 94 and Interstate 696.
Michigan State Highway 11, 28th St, Wilson Ave, Remembrance Rd and Ironwood Dr in greater Grand Rapids, goes from Cascade to Marne.
Michigan State Highway 13, Lennon to Standish.
Michigan State Highway 14, I-94 west of Ann Arbor to Livonia.
Michigan State Highway 15, Clarkston to Bay City.
Michigan State Highway 16, (decommissioned) A precursor to US-16, itself decommissioned in Michigan.
Michigan State Highway 17, Ann Arbor to Ypsilanti.
Michigan State Highway 18, North Bradley to M-72 northeast of Roscommon.
Michigan State Highway 19, New Haven area to east of Bad Axe.
Michigan State Highway 20, New Era to Midland.
Michigan State Highway 21, Grand Rapids to Flint.
Michigan State Highway 22, US-31 near Manistee to Traverse City.
Michigan State Highway 24, Auburn Hills to Unionville.
Michigan State Highway 25, a Michigan Heritage Route along Lake Huron around Michigan's "Thumb".
Michigan State Highway 26, Rockland area to Copper Harbor.
Michigan State Highway 27, a former route of US-27 from Indian River to Cheboygan.
Michigan State Highway 28, major route across the Upper Peninsula from Wakefield to M-129 south of Sault Ste. Marie.
Michigan State Highway 29, west of New Baltimore to Marysville.
Michigan State Highway 30, Sanford to West Branch.
Michigan State Highway 32, East Jordan to Alpena.
Michigan State Highway 33, Alger to south of Cheboygan.
Michigan State Highway 34, Osseo to Adrian.
Michigan State Highway 35, Menominee to Negaunee.
Michigan State Highway 36, Mason to Whitmore Lake.
Michigan State Highway 37, Battle Creek to Old Mission Point.
Michigan State Highway 38, Ontonagon to Baraga.
Michigan State Highway 39, Southfield Frwy & Southfield Hwy, goes from Lincoln Park to Southfield, connects with United States Highway 12 and Interstate 94.
Michigan State Highway 40, US-12 to Holland.
Michigan State Highway 42, Mesick to north of Lake City.
Michigan State Highway 43, South Haven to Webberville.
Michigan State Highway 44, Kentwood to Woods Corners.
Michigan State Highway 45, Agnew to Grand Rapids.
Michigan State Highway 46, Muskegon to Port Sanilac.
Michigan State Highway 47, west of Saginaw to east of Midland.
Michigan State Highway 48, Rudyard to M-134 west of DeTour Village.
Michigan State Highway 49, Ohio state line to Litchfield.
Michigan State Highway 50, I-96 south of Lowell to Monroe.
Michigan State Highway 51, Indiana state line south of Niles to I-94 west of Paw Paw.
Michigan State Highway 52, Ohio state line to M-46 east of Hemlock.
Michigan State Highway 53, Detroit to Port Austin.
Michigan State Highway 54, Grand Blanc to Birch Run.
Michigan State Highway 55, Manistee to Tawas City.
Michigan State Highway 57, US-131 south of Cedar Springs to Otisville.
Michigan State Highway 58, Saginaw Township to downtown Saginaw.
Michigan State Highway 59, Howell to northeast of Mount Clemens.
Michigan State Highway 60, Niles to Jackson.
Michigan State Highway 61, M-115 south of Marion to Standish.
Michigan State Highway 62, Indiana state line south of Edwardsburg to east of Eau Claire.
Michigan State Highway 63, M-139 at Scottdale to I-196/US-31 in northern Berrien County.
Michigan State Highway 64, Wisconsin state line south of Marenisco to Ontonagon.
Michigan State Highway 65, US-23 east of Omer to US-23 southeast of Rogers City.
Michigan State Highway 66, Indiana state line south of Sturgis to Charlevoix.
Michigan State Highway 67, Trenary to Chatham.
Michigan State Highway 68, Alanson to Rogers City.
Michigan State Highway 69, Crystal Falls to US-2/US-41 east of Bark River.
Michigan State Highway 71, Owosso to Durand.
Michigan State Highway 72, Empire to Harrisville.
Michigan State Highway 73, Wisconsin state line southwest of Iron River to US-2 west of Iron River.
Michigan State Highway 75, Boyne Falls to Walloon Lake.
Michigan State Highway 76, (decommissioned), Standish to Empire, later south of Grayling.
Michigan State Highway 77, Blaney Park to Grand Marais.
Michigan State Highway 78, M-66 north of Battle Creek to Olivet.
Michigan State Highway 79, M-37 southeast of Hastings to Charlotte.
Michigan State Highway 80, Kinross to M-129.
Michigan State Highway 81, Saginaw to M-53.
Michigan State Highway 82, M-120 west of Fremont to Howard City.
Michigan State Highway 83, Birch Run to Arthur.
Michigan State Highway 84, Saginaw to Bay City.
Michigan State Highway 85, Flat Rock to Detroit.
Michigan State Highway 86, Three Rivers to west of Coldwater.
Michigan State Highway 88, Eastport to Mancelona.
Michigan State Highway 89, I-196/US-31 west of Fennville to Battle Creek.
Michigan State Highway 90, M-24 west of North Branch to Lexington.
Michigan State Highway 91, west of Belding to Lakeview.
Michigan State Highway 93, Camp Grayling to Hartwick Pines State Park.
Michigan State Highway 94, M-553 at Sawyer International Airport south of Marquette to Manistique.
Michigan State Highway 95, Wisconsin state line at Kingsford to US-41/M-28 near Humboldt.
Michigan State Highway 96, Kalamazoo to Marshall.
Michigan State Highway 97, Detroit to M-59 northwest of Mount Clemens.
Michigan State Highway 99, Ohio state line south of Hillsdale to Lansing.
Michigan State Highway 100, Potterville to I-96 north of Grand Ledge.
Michigan State Highway 102, 8 Mile Road along the northern boundary of Detroit, made famous in Eminem's movie 8 Mile
Michigan State Highway 103, Indiana state line to Mottville.
Michigan State Highway 104, Ferrysburg to Nunica.
Michigan State Highway 106, Jackson to Gregory.
Michigan State Highway 107, Lake of the Clouds Overlook in the Porcupine Mountains State Park to Silver City.
Michigan State Highway 108, Interstate 75 at Mackinaw City into Mackinaw City.
Michigan State Highway 109, M-22 north of Empire to Glen Arbor.
Michigan State Highway 110, US-31 north of Manistee to Orchard Beach State Park, decommissioned December 2003. Now a local road.
Michigan State Highway 113, M-37 north of Buckley to Walton Junction.
Michigan State Highway 115, Frankfort to Clare.
Michigan State Highway 116, Ludington to Ludington State Park.
Michigan State Highway 117, south of Engadine to southwest of Newberry.
Michigan State Highway 119, Bay View to Cross Village.
Michigan State Highway 120, Muskegon to Hesperia.
Michigan State Highway 121, I-69 to I-75/US 23 south of Flint, decommissioned December 2003. Now a local road.
Michigan State Highway 123, Rogers Park to Newberry.
Michigan State Highway 124, Brooklyn to US-12.
Michigan State Highway 125, Ohio state line south of Erie to US-24 north of Monroe.
Michigan State Highway 129, Cedarville to Sault Ste. Marie.
Michigan State Highway 134, Interstate 75 north of Saint Ignace to south of Drummond on Drummond Island.
Michigan State Highway 136, Brockway to Fort Gratiot.
Michigan State Highway 137, Interlochen State Park to Interlochen Corners.
Michigan State Highway 138, M-15 west of Munger to M-24 east of Akron.
Michigan State Highway 139, Berrien Springs to Benton Harbor.
Michigan State Highway 140, BUSINESS US-31 north of Niles to South Haven.
Michigan State Highway 142, Bay Port to Port Hope.
Michigan State Highway 143, (unsigned) west East Lansing city limit to downtown East Lansing.
Michigan State Highway 149, Thompson to Palms Book State Park.
Michigan State Highway 150, Rochester Hills to Rochester.
Michigan State Highway 152, Berrien/Van Buren County line to M-51 north of Dowagiac.
Michigan State Highway 153, near Dixboro to Detroit.
Michigan State Highway 154, on Harsens Island south of Sans Souci to Harsens Island Ferry Landing.
Michigan State Highway 156, Ohio state line at Morenci to Clayton.
Michigan State Highway 157, M-55 east of Prudenville to M-18 northeast of Prudenville.
Michigan State Highway 168, Elberta
Michigan State Highway 179, Bradley to M-43 west of Hastings.
Michigan State Highway 183, Fayette State Park to Garden Corners
Michigan State Highway 185, highway prohibiting motorized vehicles on Mackinac Island
Michigan State Highway 186, M-113 west of Fife Lake to Fife Lake.
Michigan State Highway 188, VFW National Home to Eaton Rapids.
Michigan State Highway 189, Wisconsin state line south of Iron River to Iron River.
Michigan State Highway 199, Interstate 94 west of Albion to Albion.
Michigan State Highway 201, Northport.
Michigan State Highway 203, Hancock to Calumet.
Michigan State Highway 204, Leland to Suttons Bay.
Michigan State Highway 205, decommissioned November 2002. Now a local road.
Michigan State Highway 211, Onaway to Onaway State Park.
Michigan State Highway 212, Aloha to M-33 east of Aloha.
Michigan State Highway 216, Marcellus to Moorepark.
Michigan State Highway 217, Indiana state line south of Union to Union.
Michigan State Highway 221, M-28 south of Brimley to Brimley.
Michigan State Highway 222, Allegan to Martin.
Michigan State Highway 227, Interstate 69 south of Marshall to Marshall.
Michigan State Highway 239, Indiana State line to Interstate 94 to New Buffalo.
Michigan State Highway 247, Bay City to Bay City State Recreation Area.
Michigan State Highway 294, Interstate 94 to Battle Creek.
Michigan State Highway 311, (unsigned) Burlington to Interstate 94 east of Battle Creek.
Michigan State Highway 331, (unsigned) Kalamazoo.
Michigan State Highway 553, Gwinn to Marquette.
Michigan State Highway 554, (unsigned) Marquette.

County-Designated Highways

Below is a list of only a few of the many County-Designated Highways in Michigan:
A-2,
C-58, I-75 (near Wolverine) to Petoskey
C-66, Cross Village to Cheboygan
D-19, Howell to Pinckney
D-32, Gregory to Pinckney; "the road to Hell"
H-13, Nahma Junction to Miners Castle, Pictured Rocks National Lakeshore
H-63, Evergreen Shores to Sault Ste. Marie

Business / Connector Routes

Below is a list of only a few of the many Business Routes or Connector Routes in Michigan in no apparent order:
Michigan State Highway 13 connector, I-75/US-23 to Kawkawlin
U.S. Highway 24 connector (Taylor), I-75 to Taylor
U.S. Highway 24 connector (Woodhaven), Woohaven
CONN M-44, Grand Rapids
BL I-75 (Gaylord)
BL I-75 (Grayling)
BL I-75 (Monroe), (proposed)
BL I-75 (Pontiac)
BR US-10 (Claire)
BR US-23 (Ann Arbor)
BR US-23 (Fenton)
BR US-23 (Rogers City)
BR US-127 (Alma)
BR US-127 (Clare)
BR US-127 (Harrison)
BR US-127 (Mt. Pleseant)
BR US-127 (St. Johns)
BS I-75 (Bay City), Bay City
BS I-75 (Mackinaw City), (does not exist yet) I-75 to centre of town.
BS I-75 (Sault Ste. Marie), I-75 to Sugar Island ferry docks
BS I-375, (unsigned) I-375 to M-10 (downtown Detroit)

Unique named highways

Notable freeway segments in Michigan

Brighton-Farmington Expressway, (I-96/M-5) Brighton to Farmington; no longer named as such.
Walter P. Chrysler Freeway, (I-75), (I-375;1.2 miles) Downtown Detroit to northern Oakland County.
Christopher Columbus Freeway, (M-53) Sterling Heights to Washington Township; sometimes referred to as the "Van Dyke Expressway" by locals.
Davison Freeway, (M-8)
Detroit-Toledo Expressway, (I-75) Ohio border to Woodhaven
Fenton-Clio Expressway, (US 23) Livingston/Genesee county border to Birch Run; no longer named as such.
G. Mennen Williams Freeway, (I-75) in Cheboygan and Mackinac Counties.
Haggerty Connector, (M-5) Novi to Commerce Township; not officially named as such.
John C. Lodge Freeway, (M-10) Southfield to downtown Detroit
Mackinac Bridge, (I-75) spanning the Straits of Mackinac between Mackinaw City and St. Ignace.
Zilwaukee Bridge, (I-75/US-23) spanning the Saginaw River at Zilwaukee

Unsigned State Trunklines

Below is a list of only a few of the many unsigned state trunklines in Michigan:
Industrial Dr.
Old US-27 (Clinton County, MI)
Old M-14 (Wayne County, MI)
Old BL I-96 (Farmington, MI)

Highways featuring unique signage

Other unique road names

External links